|C. x corbariensis (C. populifolius x c. salviifolius) syn. C. x hybridus is a dense evergreen shrub with ovate, forest green leaves. White flowers with yellow centers and stamens are put forth singly and last only a day but are replenished with new ones the next. Very nice in borders, along pathways, or at the base of walls. They will thrive in poor soil but not in colder climates.